Your body is the best early warning system—don’t rely solely on tests. “You already have a natural testing device,” and being aware of unusual changes can help detect cancer early, which greatly improves treatment outcomes.

Some early symptoms may not seem related to cancer or the tumor’s location. These indirect signs are caused by how cancer affects other systems or how the body reacts. Here are five early symptoms to watch for:

1. **Shortness of breath or wheezing** – Many lung cancer patients say this was one of their first signs, though they didn’t connect it to cancer at first.

2. **Frequent infections or fevers** – This can signal leukemia, a blood cancer that begins in the bone marrow and weakens the immune system.

3. **Trouble swallowing** – Often linked to throat cancer, but may also indicate lung cancer.

4. **Fatigue and weakness** – While common, persistent tiredness alongside other symptoms could suggest cancer.

5. **Loss of appetite or feeling full quickly** – A warning sign of ovarian cancer, especially if you haven’t eaten much but still feel full.

If you notice any of these signs, see your doctor promptly—early action could save your life.